Yaban Hayatı Çalışmalarında Fotokapan Kullanımı

Yasin Uçarlı, Bülent Sağlam
1.397 212

Öz


Fotokapanlar tür araştırmalarında, bolluk ve yoğunluk tahminlerinde giderek artan bir şekilde kullanılmaktadır. Fotokapanlar özellikle sarp arazilerde, yoğun vejetasyonla kaplı alanlarda ya da hedef türün geceleri daha fazla aktif olması durumlarında doğrudan gözlemlere çok iyi bir alternatiftir. Fotokapanların kullanımının en temel nedeni farklı noktalarda, aynı anda ve sürekli bir şekilde gözlem yapılmasının doğuracağı ekonomik, personel ve zaman kaybını ortadan kaldırmasıdır. Harekete ve ısıya duyarlı fotokapanlar modellerine göre fotoğraf veya video kaydı yapabilmektedirler. Fotokapanların kurulum noktaları tespit edilirken hedef türün geçit noktaları, beslenme ya da çiftleşme noktaları öncelikli olarak ele alınmaktadır. Elde edilen görüntüler yakalama-yeniden yakalama örneklem metodu (Capture-Recapture) ile kombine edilerek hedef türün popülasyon büyüklüğü ortaya konulmaktadır. Popülasyon büyüklüğünün etkili örnekleme alanına bölünmesi ile popülasyon yoğunluğu tespit edilebilmektedir. Ayrıca, temin edilen görüntülerden hedef türün çiftleşme zamanı, habitat tercihi, doğum zamanı ve yavru durumları, grup yapıları ve hayatta kalma oranları hakkında da veriler elde edilebilir. Planlama ve koruma çalışmaları bazında ele alındığında genel olarak fotokapanlar özellikle doğrudan gözlemi zor olan gizemli türlerle ilgili gerekli verilerin elde edilmesine ve bunun ekonomik bir yolla yapılmasına ciddi manada katkı sağlamaktadır.

Anahtar kelimeler


Fotokapan, popülasyon yoğunluğu, habitat kullanımı

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